holoprosencephaly
(hŏl′ō-prŏs′ĕn-sĕf′ə-lē, hō′lō-)- Failure of the forebrain to divide into hemispheres or lobes causing insufficient development of facial characteristics such as the nose, lips, and palate; in severe cases, cyclopia can occur.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.